Entergy Corp. v. Riverkeeper Inc.
| Industry | Energy |
|---|---|
| Headquarters | United States |
| Products | Electricity generation and retail distribution |
Entergy Corp. v. Riverkeeper, Inc. (556 U.S. 208, 2009) represents a Supreme Court ruling addressing the Environmental Protection Agency’s (EPA) interpretation of the Clean Water Act in relation to cooling water intake structures at power generation facilities. The law mandates the use of the "Best Technology Available" to reduce environmental harm. The pivotal question was whether the EPA could incorporate a cost–benefit analysis (CBA) when selecting the Best Available Technology (BAT) to comply with National Performance Standards (NPS).
In a 5-1-3 decision overturning a lower court, the Supreme Court affirmed that the EPA’s application of CBA in determining BAT was reasonable and consistent with preserving national environmental protections.
Parties
Petitioner: Entergy Corporation is an energy provider specializing in electricity generation and retail distribution, operating both nuclear and fossil fuel plants with a total capacity of approximately 30,000 megawatts. Its subsidiary, Indian Point Energy Center, runs a three-unit nuclear facility located in Buchanan, New York—the subject facility in this litigation.
Respondent: Riverkeeper is an environmental advocacy group committed to safeguarding the Hudson River and its tributaries for communities in New York City and the Hudson Valley region. Riverkeeper has a longstanding history of enforcing pollution regulations and supports transitioning Indian Point’s output to renewable energy sources.
This case consolidated three Supreme Court appeals: Entergy Corporation v. Riverkeeper, Inc., et al., PSEG Fossil LLC, et al., v. Riverkeeper, Inc., et al., and Utility Water Act Group, v. Riverkeeper, Inc., et al.
Background
Among the major environmental statutes enacted between the 1960s and 1980s, only the Toxic Substances Control Act (TSCA) and the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) explicitly permit consideration of costs and benefits in regulatory decisions. Other statutes predominantly employ either harm-based or technology-based standards that restrict or exclude cost–benefit analysis (CBA). For example, the Clean Water Act primarily relies on technology-based criteria to achieve compliance.
Three prior Supreme Court rulings help frame the balance between environmental protection objectives and cost-benefit considerations:
- In Tennessee Valley Authority v. Hill, construction of the Tellico Dam was stopped despite $50 million already spent to protect an endangered species known as the snail darter.
- In American Textile Manufacturers Institute, Inc. v. Donovan, OSHA was found unable to rely on CBA for regulating cotton dust because the statute only authorized feasibility assessments.
- In Whitman v. American Trucking Associations, Inc., the Court determined that cost factors are prohibited when setting National Ambient Air Quality Standards (NAAQS), emphasizing health protection with “an adequate margin of safety.”
Several states and environmental organizations contested the Bush Administration EPA’s interpretation of § 316(b) of the Clean Water Act, which permitted exemptions for power plants from national standards. The EPA’s position that cost–benefit analysis could guide determination of "best technology available" (BAT) for reducing cooling water intake impacts effectively weakened environmental safeguards by allowing economic considerations to influence technology requirements.
Statute and regulations
Under Section 316(b) of the Clean Water Act, entities holding permits through the National Pollutant Discharge Elimination System (NPDES) that operate facilities with cooling water intake structures must ensure these structures are designed and operated using the best technology available to reduce environmental damage. These intake systems extract billions of aquatic organisms annually from U.S. waters, predominantly impacting early developmental stages of fish, crustaceans, and other aquatic creatures.
Prior case
In the earlier case Riverkeeper, Inc. v. EPA, decided in 2007 by the Second Circuit Court of Appeals with then-Judge Sonia Sotomayor authoring the opinion, the court determined that facilities could not rely on restoration activities—such as fish restocking or habitat enhancement—to satisfy the National Performance Standard (NPS). The court sent the case back to the EPA for further explanation regarding how NPS should be set using cost-benefit analysis (CBA) and the application of variances for facilities claiming excessive costs for compliance. Importantly, the court found that CBA contradicts the statutory requirement to employ the best technology available (BAT) to minimize environmental harm. Consideration of costs is confined to evaluating industry feasibility and choosing the least expensive technology that meets standards, effectively pausing some aspects of Phase II regulations.
This case
The petitioners’ power plants operated cooling water intake structures that posed threats to freshwater aquatic species through impingement on intake screens or entrainment into cooling processes. They contested the Second Circuit’s decision that cost-benefit analysis is not permissible when interpreting the Clean Water Act’s national performance standard and BAT determinations for existing facilities.
Respondents supported the Second Circuit’s position, arguing that EPA’s site-specific cost-benefit variance provision and reliance on CBA for setting national standards exceeded statutory authority, and urged a remand for regulatory clarification.
Adverse environmental impact
Industrial cooling water systems that draw from natural water bodies can have substantial effects on aquatic ecosystems. In 2004, industrial withdrawals reached up to daily volumes for cooling purposes, resulting in risks such as impingement of larger fish and entrainment of smaller organisms including plankton and larvae. A single power plant may impinge as many as one million adult fish within three weeks and entrain between three to four billion smaller aquatic organisms annually, disrupting local ecological balance. Across the country, these impacts equate to $73–83 million in yearly benefits linked to enhanced commercial and recreational fishing. Recognizing this issue, the Clean Water Act of 1972 tasked the EPA with regulating cooling systems to "minimize adverse environmental impact." By 2014, at least 1,065 U.S. facilities withdrew daily volumes exceeding , encompassing 521 manufacturing plants and 544 power plants.
EPA rule making
The EPA has implemented three phases of regulations designed to clarify statutory compliance while balancing environmental protection with industry costs.
- Phase I (2001) targets new intake structures, requiring closed-cycle cooling systems as Best Available Technology (BAT).
- Phase II (2004) applies to large existing facilities and provides alternatives to closed-cycle cooling for achieving reduction goals.
- Phase III (2006) focuses on certain existing and new coastal or offshore facilities.
The National Performance Standard (NPS) established by EPA mandates new facilities adopt closed-cycle cooling technologies, which decrease impingement and entrainment by up to 98%. For existing plants under Phase II, NPS aims to reduce impingement mortality by 80–95% and entrainment by 60–90% relative to baseline levels.
Due to high compliance expenses—up to nine times greater than other technologies—Phase II does not require existing plants to implement closed-cycle cooling. Instead, it permits cost-benefit analysis and allows alternative measures such as fish protection devices and habitat restoration efforts. Site-specific variances may be granted when full compliance is unattainable, relying on "Best Professional Judgement."
Following a court decision in 2007, EPA suspended Phase II rules for large power plants; however, in 2011, the Supreme Court upheld Phase II as a reasonable interpretation of the statute, reinstating its enforcement.
Primary Issue - Best Available Technology (BAT)
The court's principal question focused on whether the Clean Water Act's wording is clear and if the EPA's interpretation, particularly its authority to incorporate cost–benefit analysis (CBA) when defining BAT aimed at "minimizing adverse environmental impact," was justified.
While the EPA establishes performance criteria, it does not prescribe particular technologies for existing facilities, characterizing BAT as methods that reduce environmental damage. Facilities are required to implement systems meeting BAT standards, with the EPA overseeing compliance tailored to each site and permitting exceptions under specified circumstances. Importantly, unlike other environmental standards, the Clean Water Act’s definition of BAT explicitly excludes CBA as a factor.
Ruling
The appellate court's decision is reversed and sent back for further proceedings.
Justice Scalia authored the majority opinion.
By a 5-justice majority, the Court reversed the Second Circuit’s ruling, concluding that Congress did not explicitly address whether CBA could be incorporated under the "best technology available" provision. The Court found the EPA’s interpretation to be reasonable. Two significant standards were examined: "best available technology economically achievable" (BATEA), which encourages progress toward pollutant reduction, and "best available demonstrated control technology" (BADT), applied to new sources targeting zero discharges where feasible. The Court differentiated BAT from these based on statutory text, granting the EPA broader latitude.
Citing Whitman v. American Trucking Associations, Inc., where Congress prohibited cost considerations under the Clean Air Act, the Court noted that since the Clean Water Act does not explicitly forbid CBA, the EPA retains discretion to use it in setting environmental standards.
Utilizing deference principles from Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc., the Court upheld the EPA’s reasonable interpretation of ambiguous statutory language.
Justice Breyer concurred in part and dissented in part.
Agreeing with employing CBA for water intake regulations, Justice Breyer criticized inconsistencies in EPA’s approach to variances and requested additional clarification. He recognized Congress’s intention to limit reliance on CBA due to concerns about regulatory delays, undervaluing environmental externalities, and diminishing innovation incentives. Nonetheless, he cautioned that banning CBA outright risks illogical decisions since policymaking inherently involves trade-offs.
Justice Stevens, joined by Justices Souter and Ginsburg, dissented.
Stevens maintained that Section 316(b) prohibits CBA based on both statutory language and congressional intent to temporarily restrict existing plant standards until stricter ones are established. He argued that if CBA is applied, it must account for all aquatic life monetarily—criticizing EPA’s valuation for covering only 1.8% of species valuable commercially or recreationally, estimating $83 million compared to $735 million for total aquatic life.
Holding: The EPA lawfully considered CBA in establishing national performance standards and issuing variances under Phase II regulations. Under Section 1326(b), "best technology available" permits weighing technology costs against environmental benefits. The EPA need only demonstrate a reasonable statutory reading, not necessarily one favored by courts or uniquely correct.
Future implications
- The United States Supreme Court determined that the Environmental Protection Agency (EPA) is permitted to incorporate cost-benefit considerations under section 316(b) of the Federal Water Pollution Control Act when establishing technology standards for cooling water intake systems.
- This ruling supports elements of the EPA’s Phase II regulations, enhancing regulatory predictability and adaptability for both industry stakeholders and regulatory bodies. Nevertheless, such flexibility could introduce environmental concerns, as some facilities might opt against implementing the most protective technologies available.
- New EPA Rule. In response to the Supreme Court’s remand, the EPA finalized a 2014 rule that defines cooling water intake requirements for approximately 1,065 existing power plants and industrial sites, requiring them to choose from seven specified technology options.
- The case Entergy v Riverkeeper signifies a judicial trend toward expanding the application of cost-benefit analysis within Environmental Health and Safety (EHS) regulations. This approach aligns with recent Supreme Court decisions that have sought to temper stringent EHS statutes enacted in earlier decades. Between 2008 and 2009, five significant environmental rulings, including Entergy, generally constrained environmental safeguards by affirming executive branch decisions that limited regulatory interventions.
See also
Notes
- Note 1: During this timeframe, statutes that did not authorize cost-benefit analysis included the Clean Water Act, Clean Air Act, Endangered Species Act, Comprehensive Environmental Response, Compensation, and Liability Act, Safe Drinking Water Act (prior to 1996), Resource Conservation and Recovery Act, Emergency Planning and Community Right-to-Know Act, and the Oil Pollution Act of 1990.
- Note 2: Section 316(b)’s Best Available Technology (BAT) mandate for water intake structures under the Clean Water Act encompasses pollution control standards such as best practicable technology (BPT), best conventional technology (BCT), best available technology economically achievable (BATEA), and best available demonstrated technology (BADT). Cost-benefit considerations apply to BPT and BCT; however, they do not apply to BATEA and BADT.
- Note 3: Noteworthy Supreme Court rulings include Winter v. Natural Res. Def. Council (2008), Entergy Corp. v. Riverkeeper, Inc. (2009), Coeur Alaska, Inc. v. Se. Alaska Conservation Council (2009), Burlington N. & Santa Fe Ry. Co. v. United States (2009), and Summers v. Earth Island Inst. (2009).